Without the accompaniment of speech, at any rate, action would not only lose its revelatory character, but, and by the same token, it would lose its subject, as it were; not acting men but performing robots would achieve what, humanly speaking, would remain incomprehensible. Speechless action would no longer be action because there would no longer be an actor, and the actor, the doer of deeds, is possible only if he is at the same time the speaker of words. The action he begins is humanly disclosed by the word, and though his deed can be perceived in its brute physical appearance without verbal accompaniment, it becomes relevant only through the spoken word in which he identifies himself as the actor, announcing what he does, has done, and intends to do.
Hannah Arendt, The Human Condition, pp. 178-9.